<template>
  <!-- 商品分类导航 -->
        <div class="type-nav">
            <div class="container">
                <div @mouseleave="currentIndex = -1">
                <h2 class="all">全部商品分类</h2>
                <div class="sort">
                    <div class="all-sort-list2" @click="goSearch"  >
                        <div class="item" v-for="(c1,index) in categoryList" >
                            <h3 @mouseenter="changeIndex(index)" :class="{show:currentIndex == index}">
                                <a 
                                :data-categoryName = c1.categoryName
                                :data-category1Id = c1.category1Id
                                >{{c1.categoryName}}</a>
                            </h3>
                            <div class="item-list clearfix" :style="{display: currentIndex == index ? 'block' : 'none'}">
                                <div class="subitem" v-for="(c2,index) in c1.categoryChild">
                                    <dl class="fore">
                                        <dt>
                                            <a
                                            :data-categoryName = c2.categoryName
                                            :data-category2Id = c2.category1Id
                                            >{{c2.categoryName}}</a>
                                        </dt>
                                        <dd>
                                            <em v-for="(c3,index) in c2.categoryChild">
                                                <a 
                                                :data-categoryName = c3.categoryName
                                                :data-category3Id = c3.category1Id
                                                >{{c3.categoryName}}</a>
                                            </em>
                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
                </div>
                <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
            </div>
        </div>
</template>

<script>
  import {mapState} from "vuex"
  export default {
    name:'TypeNav',
    data() {
        return {
            currentIndex:-1
        }
    },
    computed: {
        ...mapState({
            // 注入一个实参  state大仓库 
            categoryList:(state)=>{
                return state.home.getCategoryList;
            }
        })
    },
    methods:{
        changeIndex(index){
            this.currentIndex = index;
        },
        goSearch(event){
            const nodeElement = event.target;
            // 获取自定义属性
            let {categoryname,category1id,category2id,category3id} = nodeElement.dataset;
            if (categoryname) {
                //准备路由跳转的参数
                let location = { name: "Search" };
                let query = { categoryName: categoryname };
                //一级分类的a标签
                if (category1id) {
                query.category1Id = category1id;
                //二级分类的a标签
                } else if (category2id) {
                query.category2Id = category2id;
                //三级分类a标签
                } else {
                query.category3Id = category3id;
                }
                //给location对象动态添加一个属性query
                location.query = query;
                //路由跳转
                this.$router.push(location);
            }
        }
    }
  }
</script>

<style scoped lang="less">
  .type-nav {
        border-bottom: 2px solid #e1251b;

        .container {
            width: 1200px;
            margin: 0 auto;
            display: flex;
            position: relative;

            .all {
                width: 210px;
                height: 45px;
                background-color: #e1251b;
                line-height: 45px;
                text-align: center;
                color: #fff;
                font-size: 14px;
                font-weight: bold;
            }

            .nav {
                a {
                    height: 45px;
                    margin: 0 22px;
                    line-height: 45px;
                    font-size: 16px;
                    color: #333;
                }
            }

            .sort {
                position: absolute;
                left: 0;
                top: 45px;
                width: 210px;
                height: 461px;
                position: absolute;
                background: #fafafa;
                z-index: 999;

                .all-sort-list2 {
                    .item {
                        h3 {
                            line-height: 30px;
                            font-size: 14px;
                            font-weight: 400;
                            overflow: hidden;
                            padding: 0 20px;
                            margin: 0;

                            a {
                                color: #333;
                            }
                            &.show{
                                background-color: #ddd;
                            }
                           
                        }

                        .item-list {
                            display: none;
                            position: absolute;
                            width: 734px;
                            min-height: 460px;
                            background: #f7f7f7;
                            left: 210px;
                            border: 1px solid #ddd;
                            top: 0;
                            z-index: 9999 !important;

                            .subitem {
                                float: left;
                                width: 650px;
                                padding: 0 4px 0 8px;

                                dl {
                                    border-top: 1px solid #eee;
                                    padding: 6px 0;
                                    overflow: hidden;
                                    zoom: 1;

                                    &.fore {
                                        border-top: 0;
                                    }

                                    dt {
                                        float: left;
                                        width: 54px;
                                        line-height: 22px;
                                        text-align: right;
                                        padding: 3px 6px 0 0;
                                        font-weight: 700;
                                    }

                                    dd {
                                        float: left;
                                        width: 415px;
                                        padding: 3px 0 0;
                                        overflow: hidden;

                                        em {
                                            float: left;
                                            height: 14px;
                                            line-height: 14px;
                                            padding: 0 8px;
                                            margin-top: 5px;
                                            border-left: 1px solid #ccc;
                                        }
                                    }
                                }
                            }
                        }

                        // &:hover {
                        //     .item-list {
                        //         display: block;
                        //     }
                        // }
                    }
                }
            }
        }
    }
</style>